Add activity filter for endpoint message types

[dvdstelt]

Closes #2890

Adds a client-side filter to the Message Types tab on the Endpoint Details monitoring view, allowing users to show only message types with recent throughput activity.

• Filter options: All (default) | 1 min | 5 min | 15 min
• Filters by checking only the trailing portion of the throughput data points matching the selected time window
• Filter options adapt to the selected history period (e.g. "15 min" is hidden when viewing 1 or 5 minute history)
• Pagination resets to page 1 and reflects the filtered count when a filter is active

Reviewer Checklist

• Components are broken down into sensible and maintainable sub-components.
• Styles are scoped to the component using it. If multiple components need to share CSS, then a .css file is created containing the shared CSS and imported into component scoped style sections.
• Naming is consistent with existing code, and adequately describes the component or function being introduced
• Only functions utilizing Vue state or lifecycle hooks are named as composables (i.e. starting with 'use');
• No module-level state is being introduced. If so, request the PR author to move the state to the corresponding Pinia store.